Thermal Spraying over Particulate-filled Epoxide Resins

Abstract

The possibility of thermal spraying over epoxy composites was investigated by paying attention to their temperature increase, and a suitable flame spraying process was selected for this experiment.
The mechanism of adhesion for the flame sprayed 18Cr-8Ni steel coating on the epoxy composite system was also investigated by changing the volume fraction of dispersion. The dispersed materials were SUS304, Al and Al₂O₃ powders and their average particle sizes were 44-68μm. The experimental results showed that the adhesion strength of the sprayed coatings increased with increasing the volume fraction of SUS304 and Al powders. However, the adhesion strength markedly decreased with increasing the volume fraction of Al₂O₃ powder. From the observation of the interface of thermal sprayed coatings by EDX, it is clear that the primary contributor to increasing adhesion strength is the bonding between the sprayed coating and the dispersed SUS304 or Al.